Wide application of mercury thermometer form and use the matters needing attention - Shanghai dragon instrument electric appliance co. , LTD

Using the temperature time, first to see its range ( Measurement range), Minimum degree value, and then see it, that is, the value of the each represents a small grid. To choose the proper thermometers measure the temperature of the object to be tested. When measuring the vacuole of the thermometer should contact with abundant object to be tested, and the glass bulb without touching the side or bottom of the object to be tested; Thermometer readings, don't separate the object to be tested, and the vision of the eye should be h flat with a thermometer. Should stop check before use ( To standard liquid temperature more than match method is used to stop check or more advanced precision thermometer calibration) 。 Don't allow use temperature beyond this the biggest scale value of the thermometer measurement value. Thermometer have thermal inertia, should arrive at the thermometer reading after a steady state. Reading should be in the highest temperature on convex curved surface tangent to read, eyes look straight. Mercury thermometer should be measured working medium with vertical or inclined shaped the direction of activities. Mercury mercury thermometer often attack the status of the fracture, the alleviation measures are: cold repair method: put thermometer temperature bag into the dry ice and alcohol mixture ( Temperature shall not go beyond - 38℃） All stop cold, make the mercury in the capillary contraction at the temperature measurement in the package. Hot repair method: insert the thermometer slow temperature slightly higher than the upper limit of measurement of the thermostatic bath, fracture local link up with the mercury, the mercury again slowly remove the thermometer, gradually cooling to room temperature in the air. Smash after treatment with sulfur powder sprinkled on the middle of the liquid mercury flowed, can become mercuric sulfide by chemical action. Mercuric sulfide won't after inhaling affect ankang, would not have a large number of volatile liquid mercury into the air to form harm to human body. Also pay attention to indoor ventilation.